Electric toothbrush



FIG. 1 is a perspective view of an electric toothbrush;

FIG. 2 is a front view thereof;

FIG. 3 is a left side view thereof;

FIG. 4 is a rear view thereof;

FIG. 5 is a right side view thereof;

FIG. 6 is a top plan view thereof; and,

FIG. 7 is a bottom plan view thereof.

The broken lines depict portions of an electric toothbrush that form no part of the claimed design. 

CLAIM The ornamental design for an electric toothbrush, as shown and described. 